NoScript is an extension for Mozilla Firefox, designed to prevent JavaScript and Flash scripts from being executed by your browser. This tool can bring extra protection to your browser by blocking clickjacking and other potential threats.

Non-intrusive Firefox add-on

You are not bothered by warning messages since the extension works in the background and stops the scripts that can be dangerous for your computer. You can configure the extension to display a short report with the blocked scripts in the add-on toolbar. If you would like to be notified when a script is blocked, then you can enable the audio feed back.

Manage permissions by creating lists

It is possible to select the websites you do not want to be affected by restrictions by adding them to a whitelist. It is a very easy to import a list of domains from a text file and you can also export the list if you want to back up the information. All privileges can be revoked if you want to be notified about all blocked items.

The types of scripts can be allowed or blocked from the "Options" window. If you are on a webpage and there are some important functions disabled by the extension, then it is possible to unblock the script temporarily with just a few clicks.

Trust or untrust websites, and other advanced settings

Some restrictions, such as blocking incoming objects, can be applied even to domains on the whitelist. If you have doubts about a certain website, then it can be marked as untrusted and subjected to additional restrictions.

Advanced users can limit untrusted websites in order to increase the extension's efficiency. You can use this section to create Anti-XSS (cross-site scripting) protection exceptions or to use external filters to check the webpage.

Conclusion

Overall, the extension is a very useful tool that allows you to browse the Internet with less interference from malicious scripts. It is mostly designed for experienced users, though.

NoScript was reviewed by Sorin Cirneala, last updated on March 2nd, 2015